Sherlock was spouting deductions rapidly, so rapidly that John was sure no one other than Sherlock could possible understand what he was saying. John had long since given up trying to follow Sherlock's train of thought and was looking around at the crime scene. There was no reason this particular case should send Sherlock into a spiral-a double homicide, and it appeared Sherlock thought that the brother had done it. At this point Sherlock was showing off, having gone deeper than just the plain deductions needed to solve the case.
After almost three minutes of incoherent deductions John started to get impatient. He walked over to Sherlock, stood resolutely in front of him and began to try to interrupt him.
"Sherlock! Sherlock, will you slow down. No one can follow what you are saying! Sherlock!"
John gasped in frustration, grabbed the lapels of Sherlock's coat and pulled him into a hasty kiss. Sherlock froze, his hands dropped to his sides; his eyes wide with shock.
John pulled back and stuffed his hands in his pockets, suddenly aware that Sherlock's silence had caused every officer i the room to look in their direction.
"Got you to stop talking, didn't I?" John said with a nervous chuckle. Sherlock didn't say anything, he continued to stand where he was and stare at John.
Lestrade started to usher all of the officers out of the room and soon Sherlock and John were alone. John continued to watch Sherlock, waiting patiently for the detective's mind to catch up with what had just happened.
"Can we try that again?" Sherlock asked after a few more silent minutes. John laughed but shook his head. "Oh." Sherlock said as he tried to turn away and hide the disappointment on his face.
"Not like that, yes we can try again. But not here, in a crime scene with Anderson peering at us through the window," John explained. Sherlock glanced over at the window and caught a glimpse of Anderson's face before it vanished.
They hurried from the crime scene, promising Lestrade they would stop by the Yard the next day to give their statements, and caught the first cab they could. The next time they kissed Sherlock was ready for it, and he knew exactly what to do.
A/N: This popped into my head, and though it wouldn't make a great full length piece I thought it would make a nice little bit of JohnLock. There is no such thing as too much JohnLock! Until next time!